A sty in the eye is not a serious condition and
will hardly ever threaten your vision. But it can be painful with
a reddened swelling that causes much anxiety.

A sty is
a localised infection in the glands within the eyelid. It can occur
externally and manifest as a tender red nodule present below the
lid margin or internally, in which case there may not be a visible
nodule.
Sties drain on their own as the infection settles spontaneously.
The following tips may help to reduce discomfort and avoid complications.
Never try to sqeeze out or drain the sty yourself. It may lead to
various complications.

Use a clean cloth soaked in warm water and wrung out as a compress.
Keep this compress for 10 to 15 minutes over the closed eye, three
to four times a day.

Remember to use a new cloth each time.

Remember to wash your hands thoroughly with soap and water before
touching your eyes.

Never use various medications, eye drops or other remedies without
advice from your doctor.

Sties are not contagious, but they can recur.

If the sty does not improve with the compress in 3-4 days or you
feel the whole eyelid getting swollen, any eye pain or if the sty
appears to be getting larger and spreading over the eyelid, see
a doctor.

The doctor may prescribe a suitable antibiotic as an eye drop or
to be taken orally if necessary. Occasionally the sty may need to
be drained but never attempt this on your own.